PLATE VI. 



Cetacean tympanic bones. 



1, 2, 3, 6, 8, 10, 11, right side ; 4, 5, 7, 9, left side; a, inner aspect, b, seen from 



below. 

 All figures half natural size, and all from Bed Crag Nodule-bed, except 1, 6, and 7. 



1. Bal-Sna biscayensis, Gray. Forest-bed, East Kunton. 



Savin Coll., Cromer. 



2, a, h. Bal^na primigenia, V. Beneden. Woodbridge, M. P. G. 



3. BALiENA APFiNis, V. Beneden. Woodbridge. M. P. G. 



4, a, b. Bal^na insignis, V. Beneden. Woodbridge. M. P. G. 

 5,a,b. Bal^ena BAL^NOPSis, F. .SewerfeM. Felixstow. M. P. G. 



6, a, b. Megaptera afpinis, V. Beneden. Coralline Crag, Sud- 



bourn. M. P. G. 



7, a, b. Megaptera min0ta, V. Beneden. (After Lydekker). 



Coralline Crag, Suffolk. Ipswich Mus. 



8, a, b. Bal^noptera definita, Owen. Felixstow. Kickman 



Coll., M. P. G. This figure has been accidentally 

 reversed. 



9, Bal^noptera emarginata, Owen. Felixstow, Presented 



by Mr. H. B. Woodward to M. P. G. 



10, a, b. Cetotherium dubium, V. Beneden. Felixstow. M. P. G. 



\\,a.b. Herpetocetus scaldibnsis, V. Beneden. Felixstow. 

 M. P. G. 



